Bibliographic Details
| Title: |
Fast-ion orbit sensitivity of neutron and gamma-ray diagnostics for one-step fusion reactions. |
| Authors: |
Järleblad, H., Stagner, L., Salewski, M., Eriksson, J., Nocente, M., Rasmussen, J., Štancar, Ž., Kazakov, Ye.O., Simmendefeldt, B., JET Contributors |
| Source: |
Nuclear Fusion; Nov2022, Vol. 62 Issue 11, p1-15, 15p |
| Subject Terms: |
NUCLEAR fusion, ORBITS (Astronomy), NEUTRON temperature, NEUTRON spectroscopy, NEUTRON emission |
| Company/Entity: |
JET Project (Joint European Torus) |
| Abstract: |
Fast ions in the MeV-range can be diagnosed by neutron emission spectroscopy (NES) and gamma-ray spectroscopy (GRS). In this work, we present orbit weight functions for one-step fusion reactions, using NES and GRS diagnostics on perpendicular and oblique lines-of-sight (LOS) at Joint European Torus (JET) as examples. The orbit weight functions allow us to express the sensitivities of the diagnostics in terms of fast-ion (FI) orbits and can be used to swiftly reproduce synthetic signals that have been computed by established codes. For diagnostically relevant neutron energies for the D(D, n)3He reaction, the orbit sensitivities of the NES diagnostics follow a predictable pattern. As the neutron energy of interest increases, the pattern shifts upwards in FI energy. For the GRS diagnostic and the T(p, Îł)4He reaction, the orbit sensitivity is shown to be qualitatively different for red-shifted, blue-shifted and nominal gamma birth energies. Finally, we demonstrate how orbit weight functions can be used to decompose diagnostic signals into the contributions from different orbit types. For a TRANSP simulation of the JET discharge (a three-ion ICRF scenario) considered in this work, the NES signals for both the perpendicular and oblique LOS are shown to originate mostly from co-passing orbits. In addition, a significant fraction of the NES signal for the oblique LOS is shown to originate from stagnation orbits. [ABSTRACT FROM AUTHOR] |
|
Copyright of Nuclear Fusion is the property of IOP Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Complementary Index |
